What is symbiosis?

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AGENDA

• What is symbiosis?
• What are the different kinds of symbiosis?
• Examples
• What is Homeostasis?
• What are some examples of how organisms maintain
  homeostasis?

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What is symbiosis?
Literal definition the act of living together

• What it means
• Two organisms that live together
• Temporarily or for a longer time
• At least one of the organisms benefits from
  the relationship

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What are the different kinds of symbiosis?
Mutualism

• Parasitism

Commensalism
both organisms benefit
one organism benefits
one organism benefits
one organism is unaffected
one organism is harmed
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Example 1 Acacia plant with ant galls
Ants lay eggs on acacia treeAcacia covers the
infected area with brown flesh (gall)
Parasitism one benefits, one is harmed
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Mutualism both benefit
Example 2 Moray Eel with Cleaner Fish
Moray Eel gets a clean mouth Cleaner Fish gets a
meal
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Example 3 Cattle with cattle egrets
Cattle stir up insects as they eat grassEgrets
hang around and eat insects
Commensalism one benefits, one is unaffected
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Example 4 Clown fish with anemone
Clown fish gets protection Anemone is unaffected
Commensalism one benefits, one is unaffected
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Mutualism both benefit
Example 5 Antelope with Oxbird
Antelope gets rid of parasites Oxbird gets a meal
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Example 6 Taenia worm in human eye
Worm infects human blood streamHuman may go blind
Parasitism one benefits, one is harmed
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Homeostasis

• Maintaining a stable internal environment.

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Examples of Homeostasis

• The thickening of fur in winter
• The darkening of skin in sunlight
• The seeking of shade in heat,
• The production of more red blood cells at high
  altitude.
• A dog panting to release body heat.

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More examples

• The regulation of the amounts of water and
  minerals in the body. This is known as
  osmoregulation. This happens in the kidneys.
• Cold-blooded animals lying in the sun to warm up.
• The removal of metabolic waste. This is known as
  excretion. This is done by the excretory organs
  such as the kidneys and lungs.

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Even More Examples

• The regulation of body temperature. This is
  mainly done by the skin.
• The regulation of blood glucose level. This is
  mainly done by the liver and the insulin secreted
  by the pancreas.

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